HP6930p yosemite 10.10 tryout and ML running (niresh)

Question

Just got back from the bar so this will be short (just so atleast hp6930p users can find this

Yosmite 10.10 :

Used two diffrent usb sticks to restore yosemite dmg from my niresh 10.8 host, no succes. boot0 or no systemdisk error after succesfull (but short +/- 20min) installation. didnt even try easybeast or something to get it to boot since i wanted to get started with osx (not even ML wasnt running propperly at that time)

sorry for mistakes in language but i had a few bears tonight im planning on a full-scale report with all details somewhere in the near future but till then people can post here for settings/kexts when in need. For Niresh & co, thx for making this possible! i would like to donate some but you guys need to tell me how i can from the netherlands....

I have never experienced the error "Couldn't find IOSurfaceRootUserCleint for task" before but in the verbose log, the prelinked kernel has expired, you can try rebuilding it by booting in Single user mode
boot with kernel flag -s
#Run the following commands one by one
mount -uw /
kextcache -i /
reboot
Let me know the results

First problem - After playing a video on any player, only the sound is played and the picture will not be displayed. I tried different settings with VLC but the image is still not.
The second problem - In Safari is scrolling OK, in Chrome the image is jerking for scrolling.
Default is Sierra after installing with HD 7000, does not help changing to HD 630
Is there anything else to do with the graphics card ?
I have already written in the forum but no one can help me. Help me please.